.add_field,.remove_field
{
    background-color: #d3d3d3;
    width: 20px;
    height: 20px;
    display: inline-block;
    text-align: center;
    color: #0033ff;
    font-size: 17px;
    cursor: pointer;
    margin-left: 2px;
    margin-top: 2px;
}

.input_holder input
{
    float:left;
}